Ratchet and Clanks preform high as platformers with guns. Not a "kid's game" at all, really made for everyone. Helps that it's main audience of players are in their twenties.
Uncharted 2 for strong Indiana Jones/Tomb Raider game play with solid multi-player.
Valkyria Chronicles for strategy RPG with a cartoonish, but rather deep, First World War remake.
Demon's Souls is what I recommend most. Huge world to explore it's labyrinth, castles, and battlefields against a hoard of the undead, dragons, and other fictional beasts. Solid game play and battle mechanics in which if you get hurt or die, it's because you made a mistake.
Online system use is great for clues, hints, back up, and Player vs Player.
Uncharted 2 for strong Indiana Jones/Tomb Raider game play with solid multi-player.
Valkyria Chronicles for strategy RPG with a cartoonish, but rather deep, First World War remake.
Demon's Souls is what I recommend most. Huge world to explore it's labyrinth, castles, and battlefields against a hoard of the undead, dragons, and other fictional beasts. Solid game play and battle mechanics in which if you get hurt or die, it's because you made a mistake.
Online system use is great for clues, hints, back up, and Player vs Player.